Ars recaps the week's top stories from One Microsoft Way.

HomeGroup: A practical guide to domestic bliss with Windows 7: Microsoft has been trying to give Windows home users a convenient, peer-to-peer networking solution since at least 2002. With Windows 7 HomeGroup, they finally got it right. Ars walks you through HomeGroup's functionality, architecture, and history.

Windows Phone 7 SDK here; YouTube, Netflix demoed; no CDMA yet: Windows Phone 7's final SDK has been released, and a range of third-party applications have been shown off. Developers can now work on applications to submit to the Windows Phone Marketplace. Also out is Microsoft's advertising SDK, making it easy to try to monetize software for the platform. One thing that won't be out this year, however, is support for Verizon or Sprint.

Zune Marketplace going to Europe, Down Under, this autumn: The Zune Marketplace is coming to Europe and beyond, Microsoft has announced, confirming recent rumors. This fall, Zune Passes, music and video purchases, and movie rentals, will be available to a limited international audience.